Remove unused param from search engine extension override helper function.

chrome/browser/ui/webui/options/browser_options_handler.cc

Index: chrome/browser/ui/webui/options/browser_options_handler.cc
diff --git a/chrome/browser/ui/webui/options/browser_options_handler.cc b/chrome/browser/ui/webui/options/browser_options_handler.cc
index a12487eebdf7c2e57a4e762e74d7b4a17a5d1f12..8b7c757a26237b21787085836db2adaee426552e 100644
--- a/chrome/browser/ui/webui/options/browser_options_handler.cc
+++ b/chrome/browser/ui/webui/options/browser_options_handler.cc
@@ -1750,7 +1750,7 @@ void BrowserOptionsHandler::SetupExtensionControlledIndicators() {
 
   // Check if an extension is overriding the Search Engine.
   const extensions::Extension* extension = extensions::OverridesSearchEngine(
-      Profile::FromWebUI(web_ui()), NULL);
+      Profile::FromWebUI(web_ui()));
   AppendExtensionData("searchEngine", extension, &extension_controlled);
 
   // Check if an extension is overriding the Home page.